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Discovery of seven companions to intermediate-mass stars with extreme mass ratios in the Scorpius-Centaurus association

Hinkley, Sasha; Kraus, A L; Cheetham, Anthony; Carpenter, J M; Tuthill, Peter G; Lacour, Sylvestre; Evans, Thomas M; Haubois, X; Ireland, Michael


We report the detection of seven low-mass companions to intermediate-mass stars (SpT B/A/F; 1.5-4.5 M<inf>o</inf>) in the Scorpius-Centaurus (Sco-Cen) Association using nonredundant aperture masking interferometry. Our newly detected objects have contrasts 4-6, corresponding to masses as low as ∼20 M<inf>Jup</inf> and mass ratios of 0.01-0.08, depending on the assumed age of the target stars. With projected separations ρ ≈ 10-30 AU, our aperture masking detections sample an orbital region...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Astrophysical Journal Letters
DOI: 10.1088/2041-8205/806/1/L9
Access Rights: Open Access


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